rusti tests failing on i686

[brson]

http://buildbot.rust-lang.org/builders/incoming-full-linux/builds/1218/steps/test/logs/stdio

[alexcrichton]

This can be closed when incoming-full-linux and incoming-full-mac have been confirmed to have passing rusti tests

[alexcrichton]

I've seen these pass on linux 32-bit. There's an open osx 32-bit issue, but it's different than this one.